diff options
Diffstat (limited to 'vendor/github.com/coreos/pkg/dlopen')
-rw-r--r-- | vendor/github.com/coreos/pkg/dlopen/dlopen.go | 82 | ||||
-rw-r--r-- | vendor/github.com/coreos/pkg/dlopen/dlopen_example.go | 56 |
2 files changed, 0 insertions, 138 deletions
diff --git a/vendor/github.com/coreos/pkg/dlopen/dlopen.go b/vendor/github.com/coreos/pkg/dlopen/dlopen.go deleted file mode 100644 index 23774f612..000000000 --- a/vendor/github.com/coreos/pkg/dlopen/dlopen.go +++ /dev/null @@ -1,82 +0,0 @@ -// Copyright 2016 CoreOS, Inc. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package dlopen provides some convenience functions to dlopen a library and -// get its symbols. -package dlopen - -// #cgo LDFLAGS: -ldl -// #include <stdlib.h> -// #include <dlfcn.h> -import "C" -import ( - "errors" - "fmt" - "unsafe" -) - -var ErrSoNotFound = errors.New("unable to open a handle to the library") - -// LibHandle represents an open handle to a library (.so) -type LibHandle struct { - Handle unsafe.Pointer - Libname string -} - -// GetHandle tries to get a handle to a library (.so), attempting to access it -// by the names specified in libs and returning the first that is successfully -// opened. Callers are responsible for closing the handler. If no library can -// be successfully opened, an error is returned. -func GetHandle(libs []string) (*LibHandle, error) { - for _, name := range libs { - libname := C.CString(name) - defer C.free(unsafe.Pointer(libname)) - handle := C.dlopen(libname, C.RTLD_LAZY) - if handle != nil { - h := &LibHandle{ - Handle: handle, - Libname: name, - } - return h, nil - } - } - return nil, ErrSoNotFound -} - -// GetSymbolPointer takes a symbol name and returns a pointer to the symbol. -func (l *LibHandle) GetSymbolPointer(symbol string) (unsafe.Pointer, error) { - sym := C.CString(symbol) - defer C.free(unsafe.Pointer(sym)) - - C.dlerror() - p := C.dlsym(l.Handle, sym) - e := C.dlerror() - if e != nil { - return nil, fmt.Errorf("error resolving symbol %q: %v", symbol, errors.New(C.GoString(e))) - } - - return p, nil -} - -// Close closes a LibHandle. -func (l *LibHandle) Close() error { - C.dlerror() - C.dlclose(l.Handle) - e := C.dlerror() - if e != nil { - return fmt.Errorf("error closing %v: %v", l.Libname, errors.New(C.GoString(e))) - } - - return nil -} diff --git a/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go b/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go deleted file mode 100644 index 48a660104..000000000 --- a/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go +++ /dev/null @@ -1,56 +0,0 @@ -// Copyright 2015 CoreOS, Inc. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// +build linux - -package dlopen - -// #include <string.h> -// #include <stdlib.h> -// -// int -// my_strlen(void *f, const char *s) -// { -// size_t (*strlen)(const char *); -// -// strlen = (size_t (*)(const char *))f; -// return strlen(s); -// } -import "C" - -import ( - "fmt" - "unsafe" -) - -func strlen(libs []string, s string) (int, error) { - h, err := GetHandle(libs) - if err != nil { - return -1, fmt.Errorf(`couldn't get a handle to the library: %v`, err) - } - defer h.Close() - - f := "strlen" - cs := C.CString(s) - defer C.free(unsafe.Pointer(cs)) - - strlen, err := h.GetSymbolPointer(f) - if err != nil { - return -1, fmt.Errorf(`couldn't get symbol %q: %v`, f, err) - } - - len := C.my_strlen(strlen, cs) - - return int(len), nil -} |